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Author SHA1 Message Date
kichikuou da5ac4a26c Support OpenGL ES 3.0 
This adds `USE_GLES` compile-time flag. If it's defined, gfx_init()
requests an OpenGL ES >=3.0 context.

This also makes the following changes to make it work with OpenGL ES:

- The USE_GLES flag also switches shader's #version directive, which is
  now provided separately from the .glsl file.
- Implicit conversion between int and float is not supported in GLSL ES.
- Use GL_RGB in gfx_copy_main_surface. Because main_surface is in GL_RGB
  format, using GL_RGBA generates GL_INVALID_OPERATION in OpenGL ES.
 2021-06-20 17:12:35 +09:00
Nunuhara Cabbage 50a719ba76 Implement DrawGraph.FillAMap{Over,Under}Border 
Used in Alice 2010.
 2021-05-14 18:35:29 -07:00